: this will be bob dickinson's 20th kennedy center honor show. he said there's imagine nick the room. three surviving members of led zeppelin are included. this was their concert in 2007. john paul jones, jimmy page, and robert plant. their songs are as epic as their more than 100 million records sold in the u.s. it's one kind of electric performance. this is another. the russian-born prima ballerina danced with the royal ballet. she performed during the kennedy center honors in 1981. now others will perform for her. >> chicago, thank you very much. i'll never leave. >> blues man buddy guy got a sendsoff for the honors. he went on to win six grammy awards. honoree dustin hoffman said when he grew up, movie stars didn't look like he did. more than 50 films later, he has two best actor oscars. honoree david letterman has more than 5,000 television broadcasts under his belt. he's being recognized for finding the humor in anything, even winning it honor. he talked about it on "the late show." >> when i stopped laughing, i was very excited. i'll tell you, because this is great for my family. they think i'